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            <span class="keyword">Dolby Vision</span>
         </span><div><span class="subtitle">Content Editing for Third-Party Developers</span></div></div></a>
                    
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                <div class=" wh_tiles "><div class=" wh_tile  " data-id="c_introduction">
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                                <div class=" wh_tile_title "><span class="topicref"><a href="topics/c_introduction.html" data-id="c_introduction">Introduction</a></span></div>
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                                <div class=" wh_tile_shortdesc ">This documentation focuses on video editing of <span class="keyword">Dolby Vision</span> files in an Android application, and covers support provided in a sample application for critical aspects on both <span class="keyword">graphics processing unit</span> (<a href="topics/g_6651.html" title="graphics processing unit: A specialized electronic circuit designed for optimal use of memory and accelerated processing to create images in a frame buffer for output to a display device.">GPU</a>) and <span class="keyword">display processing unit</span> (<a href="topics/g_6650.html" title="display processing unit: A hardware component of a Qualcomm system-on-chip (SoC) designed for accelerated processing of visual data represented as pixels.">DPU</a>)  platforms and corresponding <span class="keyword">Dolby Vision</span> versions.</div>
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                                <div class=" wh_tile_title "><span class="topicref"><a href="topics/c_display_management.html" data-id="c_display_management">Display management</a></span></div>
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                                <div class=" wh_tile_shortdesc ">There are two versions of <span class="keyword">Dolby Vision</span> capture; the version present on a device depends on the display management processing unit or platform used for <span class="keyword">Dolby Vision</span>. It is critical that an application can determine which version is present, and can run correctly on both versions. Determining the version reliably involves examining the <span class="keyword">Dolby Vision</span> codecs present on the device.</div>
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                                <div class=" wh_tile_title "><span class="topicref"><a href="topics/c_editing_gpu_shaders.html" data-id="c_editing_gpu_shaders">Editing using the GPU shaders</a></span></div>
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                                <div class=" wh_tile_shortdesc ">The sample application provides two <a href="topics/g_6651.html" title="graphics processing unit: A specialized electronic circuit designed for optimal use of memory and accelerated processing to create images in a frame buffer for output to a display device.">GPU</a> (<span class="keyword">graphics processing unit</span>) shaders for editing.  The <a href="topics/g_6650.html" title="display processing unit: A hardware component of a Qualcomm system-on-chip (SoC) designed for accelerated processing of visual data represented as pixels.">DPU</a> (<span class="keyword">display processing unit</span>) is not used for editing, but is used for display.</div>
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                                <div class=" wh_tile_title "><span class="topicref"><a href="topics/c_signaling_previewing.html" data-id="c_signaling_preview">HLG signaling and previewing</a></span></div>
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                                <div class=" wh_tile_shortdesc ">Adding support for <span class="keyword">Dolby Vision</span> editing involves understanding how to process <span class="keyword">hybrid log-gamma</span> (<a href="topics/g_1906.html" title="hybrid log-gamma: High-dynamic range standard format developed jointly by the British Broadcasting Corporation (BBC) and Nippon Hoso Kyokai (Japan Broadcasting Corporation), and defined in ARIB STD‑B67 and ETSI TS 101 154.">HLG</a>) frames correctly so that the preview surface is aware of their format.</div>
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                                <div class=" wh_tile_title "><span class="topicref"><a href="topics/c_trimming_remuxing.html" data-id="c_chapter3">Trimming and remultiplexing</a></span></div>
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                                <div class=" wh_tile_shortdesc ">When trimming directly on an encoded video bitstream to preserve video quality, <span class="keyword">Dolby Vision</span> multiplexer information must be added to the <span class="keyword">MP4</span> file. <span class="keyword">Dolby</span> provides a tool to do this that can be integrated into an application.</div>
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